Strap for Chronomat B01 42 Stainless Steel / Anthracite / Rouleaux / Boutique Edition

The lug width of the Breitling Chronomat B01 42 AB01348A1B1A1 is 22mm. This measurement is taken with a digital calliper inside the two lugs, in contact with the case, and is the essential parameter when purchasing a compatible aftermarket strap.

The most suitable straps for the Chronomat B01 42 are vegetable-tanned perforated calf leather in a rally style, Hornback alligator, vulcanised rubber for intensive sporting use, or durable nylon NATO. The choice depends on context: alligator for formal settings, Tuscan leather or rubber for everyday sporting wear.

The strap on the Chronomat B01 42 is replaced using a flat-tip spring bar tool or a 1.5–2mm fork-style remover. The original Breitling spring bars are standard diameter: compress the spring bar ends, remove the old strap and insert the new one, aligning the curved ends with the lugs. Always work on a soft surface to protect the bezel and case flanks.

Yes. Any 22mm strap with straight or slightly curved end tips is compatible with the Chronomat B01 42 AB01348A1B1A1. Milano Straps offers a selection of handcrafted 22mm straps designed specifically for wide-lugged sport chronographs, with keeper and buckle calibrated to a 20mm closing width.

The lifespan of a leather strap depends on the quality of the tanning, usage frequency and care. A full vegetable-tanned leather strap worn daily typically lasts 2–4 years before the flex point at the keeper requires replacement. Avoiding prolonged contact with water, perspiration and direct UV exposure significantly extends the strap's life and preserves its patina.